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Polymer electrolyte membrane for fuel cell and method for preparing the same

A fuel cell and polymer technology, applied in fuel cell components, fuel cells, solid electrolyte fuel cells, etc., can solve the problems of reducing energy conversion speed, increasing MEA volume, increasing proton resistance and material cost

Inactive Publication Date: 2007-10-10
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, due to the low mechanical strength of the polymer electrolyte membranes listed above, their long-term use can produce pinholes
Pinholes cause fuel to mix with oxidant (oxygen), which slows down the rate of energy conversion and degrades the output characteristics of the polymer electrolyte membrane
Therefore, thicker electrolyte membranes are sometimes used to increase mechanical strength; however, this may simultaneously increase the volume of the MEA and increase proton resistance and material cost

Method used

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  • Polymer electrolyte membrane for fuel cell and method for preparing the same
  • Polymer electrolyte membrane for fuel cell and method for preparing the same

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A non-woven rayon fabric having a thickness of 25 μm, a porosity of 60% by volume, and opening micropores with an average diameter of 5 μm was used as the porous membrane. The non-woven rayon fabric was used 5% by weight of poly(perfluorosulfonic acid) (Nafion  , DuPont) impregnated, and then taken out to dry. The micropores are filled with poly(perfluorosulfonic acid) used as a proton-conducting polymer of the porous membrane. This filling process is repeated several times to uniformly fill the poly(perfluorosulfonic acid) into the micropores. After the filling process, a rolling process is performed to prepare a polymer electrolyte film having a uniform thickness.

Embodiment 2

[0044] The polymer electrolyte membrane of the fuel cell was prepared by basically the same method as in Example 1, except that the non-woven rayon fabric was replaced by a polyethylene membrane with open micropores with the same thickness, porosity and average diameter. As a porous membrane.

Embodiment 3

[0046] The polymer electrolyte membrane of the fuel cell was prepared in the same way as in Example 1, except that a polyethylene terephthalate membrane with open micropores with the same thickness, porosity and average diameter was used instead of the non-volatile polymer electrolyte membrane. Spun rayon fabric as a porous membrane.

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Abstract

A polymer electrolyte membrane for a fuel cell includes a porous membrane forming micropores. Proton-conducting polymers fill the micropores of the porous membrane. In addition, a method for preparing the polymer electrolyte membrane includes: preparing a porous membrane having a plurality of micropores; and filling the micropores with proton-conducting polymer.

Description

Technical field [0001] The present invention relates to a polymer electrolyte membrane used in a fuel cell and a preparation method thereof. More specifically, the present invention relates to a polymer electrolyte membrane with improved mechanical strength and proton conductivity (or permeability) and a preparation method thereof method. Background technique [0002] A fuel cell is a power generation device that directly generates electrical energy through an electrochemical redox reaction of oxygen and hydrogen or hydrogen contained in hydrocarbon materials such as methanol, ethanol or natural gas. [0003] Depending on the type of electrolyte used, fuel cells can be classified into phosphoric acid type, molten carbonate type, solid oxide type, polymer electrolyte type or alkaline fuel cell. Although the working principles of these different types of fuel cells are basically the same, they are still different in terms of fuel type, operating temperature, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M2/16C08J5/22C08J9/00
CPCH01M8/106Y02E60/521H01M8/1025H01M8/1027H01M8/103H01M8/1069H01M8/1062H01M8/1039H01M8/1044H01M8/1032H01M8/1023Y02P70/50Y02E60/50H01M8/10
Inventor 金熙卓金亨俊权镐真
Owner SAMSUNG SDI CO LTD